How to Calculate Bandwidth

Bandwidth is the data rate that a network connection supports or interfaces that are linked to the network. You will consider time and volume which represents the data amount that will be transmitted between 2 points at a given tie.

Bandwidth is expressed in bits per second (bps) or bytes per second (Bps). When you know the amount of bandwidth at your disposal, you’ll be able to know the size of the website you can host. You’ll also be aware of the duration it will take to transfer files and the internet settings that will suit you best.

To calculate bandwidth, you need to know your data size. For instance, let’s consider a document that has 120 kbytes data and use it in our calculation.

Step 1

Convert the 120 kbytes into bits- 10* 120 kbytes = 1200 bits

If the available network is 100mb/second, here is how you will carry out the calculations

When dimensioning the bandwidth, you need to consider how slow or fast every link is over the LAN or WAN which depends on the extent that the bandwidth throughput rating from A to B. (Consider the calculation above for reference).

It is important to note, however, that all links will not have the same speed and at times you’ll need to consider Round Trip that is usually twice the time.

You can only use this method to calculate the data traffic bandwidth only. If you need to dimension VOIP traffic, there are other additions you will need to consider.

If you cannot be able to come up with the figure that you need on time, you can also contact your network provider. They will be able to provide the information you need regarding your internet connection, your usage, the download rates, and the potential caps.